Revision as of 16:41, 19 July 2011

Android Basics

• Install 32 bit Java JDK http://www.oracle.com/technetwork/java/javase/downloads/index.html

• App Inventor Pretty basic web interface an blocks editor to build simple android apps http://appinventor.googlelabs.com/about/
  • Setup App Inventor http://appinventor.googlelabs.com/learn/setup/

• Android SDK
  • http://developer.android.com/sdk/index.html
  • Install SDK Installer http://developer.android.com/sdk/tools-notes.html
  • Install Eclipse http://www.eclipse.org/downloads/
  • Install Eclipse ADT Plugin http://developer.android.com/sdk/eclipse-adt.html#installing

• Android NDK
  • we're not covering this http://developer.android.com/sdk/ndk/index.html

Basics

• src folder containg all the source
• res folder containing all the resources

Resources

No DPI or PPI Andoid uses dp density independent pixels or sp scale interdependent pixels http://developer.android.com/guide/topics/resources/more-resources.html#Dimension

also see supporting multiple screens http://developer.android.com/guide/practices/screens_support.html

Activities

Activity life cycle http://developer.android.com/guide/topics/fundamentals/activities.html#Lifecycle

Get an instance of an object from the R class

notice the cast to the type

<java>Button btn = (Button)this.findViewById(R.id.button1); </java>

Events

Lots more good reading http://developer.android.com/guide/topics/fundamentals.html